Transmitting apparatus.



H. SHOEMAKER.

TRANSMITTING APPARATUS,

APPLICATION FILED APR. 8, 1907.

Patented May 11, 1909.

FDCEF k 0 al/$294171 UNITED STATES PATEN T OFFICE.

HARRY SHOEMAKER, OF JERSEY CITY, NEW JERSEY, ASSIGNOE 'IO INTERNATIONAL TELE- GRAPH CONSTRUCTION COMPANY, A CORPORATION or NEW Y"RK.

TRANSMITTING APPARATUS Specification of Letters Patent.

rammed May 1 1, .1 909.

Application filed April 8, 1907. Serial No. 367,058.

To all whom it may concern:

Be it known that I, HARRY SHOEMAKER, a 1 citizen of the United States, residing at Jersey City, county of Hudson, State of New I Jersey, have invented certain new and useful Improvements in Transmitting Apparatus, of which the following is aspecification;

My invention relates to transmitting apparatus and particularly transmitting aplpa ratus suitable for use in space telegrap or telephone systems, in which the ener is transmitted through the natural medla in the form of high frequency electric waves.

It is the object of my invention to provide a space telephone or telegraph transmitting apparatus w ich shall be capable of emitting sustained or practically continuous high frequency electric waves. To this end, I dispense with the usual s ark gap of space telegraph systems, and dispense also with the electric arc in air or other atmosphere. I.

rovide a liquid device which is common to both thecircuit which supplies the electric energy and a high fre uency oscillating circuit containing suita ly' related capacity and inductance. This li uid device comprises a body of suitable iquid, preferably electrolytic, in which are separated suitable terminals between which there is formed a continuous are or flame or other heat manifestation.

. For an illustration of some of the forms my invention may take reference is to be had to the accompanying drawing, in which:

Figure 1 is a diagrammatic view illustrating the circuit arrangements and associated liquid device. Fig. -2 is a vertical sectional view, partly in elevation, of a modified form of a liquid device.

Referring to Fig. 1, G is a suitable source of direct current, such as a direct current dynamo electric machine, having the field winding f separately excited by the source of ener y b and suitably controlled by the adjusta le resistance 1 By varying the resistance r the potential and output of the generator G may be varied and controlled.

is an adjustable non-inductive resistance included in the circuit of the generator G along with suitable and adjustable inductances'l and Z. The circuit of the-generator G is completed through the non-inductive resistance R and the adjustable inductances Z, Z and the liquid device A. The latter .8 a telep one transmitter '1.

comprises a suitable containing vessel B,

- preferably of ihsulating material, in which is contained a suitable liquid C, such as a solution of ammonium phosphate; ammonium nitrate aluminum sulfate; etc., or other preferably electrolytic liquids. Immersed in other in the liquid 0 are two conductingterminals D and E, the former in communication with the positive terminal of the generator G being preferably aluminum, while the other, E, is by preference, iron. Suitable insulating coverings F, F may be provided, though it does not seem to be imperative that only the tips of the conductors D and E be exposed to the liquid.

The liquid device A is common also to the circuit including the variable condenser V K, adjustable inductance L and the operator's key 7r. The inductance L may be associated with any suitable aerial conductor, as A having, if desired, an earth connection H.

When using for the conductors D and E rods of aluminum and iron of about of an inch in diameter, and when separatedfrom 1- to e of an inch and with a pressure of about 500 volts from the generator G, I have found satisfactory conversion of the direct current energy into high frequency sustained electrical oscillations in the circuit of the condenser VK and inductance L. During such 'conversion, there is a continuous flame or are manifestation between the terminals D and E within the body of the liquid. As stated, this eflect is not an interrupter effect, but is, as visible to the eye, perfectly continuous in o eration. It is to be understood, however, t at my invention is not limited to the conditions just named, either as to dimensions of conductors D and E, their composition, their separation, or the'voltage of the supply.

n place of the direct current generator G, the switch 8 may be opened and the switch 8 may be closed thus bringing into circuit the generator G of fluctuating or alternating current. And in place of the telegra h key Is, there ma be brought into circuit by switch In Fig. 2, the conductors D, E are shown horizontally disposed and extending through the vertical walls of the vessel B. The insulating coverings F, F are clamped in position by suitable nuts at, making liquid tight joints. The conductors D and E may be moved horizontally to adjust their separation.

While I have shown the inductance of the high frequency oscillating circuit as included in the aerial conductor, it is to be understood that any other suitablejarrangement may be employed for impressing high frequency energy upon the radiating conductor, which ma be of any suitable form, as the open aerial or the looped aerial.

What I claim is: v

1. In transmitting aJparatus, the combination with a circuit inc uding a source of energy, of a high frequency oscillating circuit, separated conductors immersed in electrolytic liquid common to both circuits, and a signaling instrument.

In transmitting apparatus, the combination with a circuit including a source of direct current, separated conductors immersed in electrolytic hquld and traversed by energy from said source, and a clrcuit containmg capacity and inductance and having high natural frequency, said separated conductors being common to both circuits.

3. In transmitting apparatus, the combi: nation with a circuit including a source of current, said circuit closed between terminals separated in electrolytic liquid, a circuit having high natural frequency including said separated terminals andliquid, and a radiating conductor associated with said high frequency circuit.

In testimony whereof I have hereunto affixed my signature in the presence of the two subscribing witnesses. V V V HARRY SHOEMAKER- Witnesses:

JAMES M. SAWYER, ELIZABETH, F. DUFFY. 

